Greenies, I've stuck by you for so long and made so many excuses for the bad service, now I'll go to mojo bones or poppas. Carrie L. and 2 others voted for this review Useful 3
Functions[edit] A function, which can also be referred to as subroutine, procedure, subprogram or even method, carries out tasks defined by a sequence of statements called a statement block that need only be written once and called by a program as many times as needed to carry out the same task.
A technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.his means that if the object $x$ is in the set of inputs (called the domain) then a function $f$ will map the object $x$ to exactly one object $f(x)$ in the set of possible outputs (called the codomain).